The market here is SO saturated with eggs here. We've all but gotten out of the ducks. We have 3 left. At one point I had about 7 dozen duck eggs and nobody to buy ducklings or eggs, so I was giving them to neighbors for free! Farm fresh eggs sell for around $2.50/dozen. That's not even really enough to cover the cost of feed! It's ridiculous! I'm glad we're allowed to keep chickens in our city (which I live outside of) but people giving their eggs away for such cheap prices make it harder for any body that wants to make a living out of it almost impossible!
I think the "missing" eggs were because of stress, heat, molt, any of those things or more... LOL We did find *A* snake in the coop one time. It was a big one too!! I'm not exactly sure how it got in, but as it was trying to get out I lopped it's head off with a knife. LOL The chickens ate it after that. As far as I know we don't have a problem with mice/rats, but you never know! We live in a more suburban area (in the country.. LOL) and don't seem to really have the same issues as "country" but more issues with "city." IO have been very fortunate tho. Some of my city friends have been talking about hawk attacks, and some of my country friends about fox attacks, one of which lives less than a 3 miles from me. We've not had either of those issues here in the 2 years we've had chickens.